Imaging Science and Photochemistry ›› 2016, Vol. 34 ›› Issue (6): 513-525.DOI: 10.7517/j.issn.1674-0475.2016.06.513

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A “Turn-on” Fluorescent Chemosensor with the Aggregation-induced Emission Characteristic for High-selective Detection of Hg2+

PAN Xiaoling, ZHANG Yahui, KONG Lingwei, SHI Jianbing, TONG Bin, DONG Yuping   

  1. Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
  • Received:2016-10-02 Online:2016-11-15 Published:2016-11-15

Abstract:

A hexaphenyl-1,3-butadiene derivative containing methylpyridinium moiety, 4,4'-((1E,1'E)-(((1E,3E)-1,2,3,4-tetraphenylbuta-1,3-diene-1,4-diyl)bis(1,4-phenylene))bis(ethene-1,2-diyl))bis(N-methylpyridinium) iodide (HPB-PyM), was firstly synthesized through Heck reaction of HPB-Br with 4-vinylpyridine and subsequent methylation with iodomethane. As the precursors of HPB-PyM, HPB-Br and HPB-Py showed excellent aggregation-induced emission characteristic. In contrast, HPB-PyM exhibited orange emission (λem=605 nm) in the solid state with aggregation-caused quenching (ACQ) characteristic. Moreover, the fluorescence of HPB-PyM via AIE mechanism could be lightened and significantly enhanced by Hg2+ ions. As a "turn on" probe, HPB-PyM not only exhibited a rapid, sensitive, and selective response towards Hg2+ but also achieved linear and colorimetric detection for Hg2+ with a detection limit of 4.153 μmol/L.

Key words: hexaphenyl-1,3-butadiene derivative, high-selective, detection of Hg2+, "turn-on", fluorescent response